Gold and Silver

Question 1

Properties of Gold

Answer 1

Butter Yellow, Shiny, not very reactive, does not oxidize, very ductile and malleable, very dense, high electrical conductivity

Question 2

Properties of silver

Answer 2

Highest Electrically conductive, Thermally conductive, metallic, silver-white, High malleable and ductile(only less then gold), Hardness of 2.5-3,

Question 3

Similar properties of silver and gold

Answer 3

soft, conductive

Question 4

Cupellation

Answer 4

Extracts silver from ores. Lead and silver are combined, then heat up to 960 C. Lead oxidizes and leaves behind silver metal. It is a toxic process.

Question 5

Lead uses

Answer 5

Alloyed with tin for solder, Roof sheeting, Lead water pipes,

Question 6

Lead constraints

Answer 6

Can be toxic can cause death

Question 7

Amalgamation

Answer 7

• mix gold ore with mercury
• Forms an amalgamation
• Boil off mercury, leaves gold behind

Question 8

Cyanidation

Answer 8

• Dissolve gold in cyanide solution

- Extract a high % of gold but is toxic

Question 9

Liquation

Answer 9

• If gold and silver are mixed with copper
• Mix in lead and heat until lead melts.
• Gold and silver are more soluble in lead then copper which is why the gold and silver are left behind.
• To separate gold and silver, follow with cupellation

Question 10

What is electrum?

Answer 10

Gold Mixed with silver

Question 11

What is parting?

Answer 11

Parting is used to separate gold and silver.

• Involves heating electrum with salt to form silver chloride and gold
• Recover silver chloride and turn into silver
• First done in Lydia

Question 12

What are the 6 ways of refining gold and silver?

Answer 12

1. Cupellation
   - Extracting silver from lead
2. Amalgamation
   - Extracting gold from rocks using mercury
3. Cyanidation
   - Extracting Gold from rocks using Cyanide
4. Liquation
   - Extracting Gold and Silver from copper using lead
5. Parting
   - Separating gold and silver (electrum) using salt
6. Slucing
   - Separate gold from gravel

Question 13

Modern Use of Gold

Answer 13

Currency, Jewelry, Awards, Microelectronics, Gold particles used for red coloring in glass,

Question 14

Modern uses of Silver

Answer 14

Decorative arts, industry, photographic film, coins, dentistry,

Question 15

What is value?

Answer 15

The regard that something is held to deserve

Question 16

Modern Nano uses for Gold and silver

Answer 16

Medicine, Glass, Laser mouse

Question 17

Medieval Nano uses for gold and silver

Answer 17

Stained Glass

Question 18

6 Characteristics of Money

Answer 18

1. Durability
2. Divisibility - must be easy to divide into smaller parts
3. Portability
4. Homogeneity
5. Acceptability - People need to recognize it for daily use
6. Of limited or stable supply - Deferred consumption

Question 19

Where does most gold come from in earth?

Answer 19

Meteorites